Are you certain the temp was only at 100 C when this happened?
My 400E is purported to turn the A/C compressor on/off in 30-second bursts when the car is very, very hot. That was the last straw before cutting things off entirely.
I read that somewhere; I could find out where if you think it's relevant.
1993 400E (104K)
"Instant gratification isn't fast enough."